ICS Nav6plus User manual

NAV6plus User Guide
MAN 3008.00
Issue 2.0
ICS Electronics Limited.
Unit V, Rudford Industrial Estate
Ford, Arundel, West Sussex
BN18 0BD
United Kingdom
Tel: [phone]
Fax: [phone]
E-Mail:
[e-mail]
[e-mail]
Website: www.icselectronics.co.uk
The technical data, information and illustrations contained in this publication
were to the best of our knowledge correct at the time of going to print. We
reserve the right to change specifications, equipment, installation and
maintenance instructions without notice as part of our policy of continuous
product development and improvement. No part of this publication may be
reproduced, stored in a retrieval system or transmitted in any form, electronic
or otherwise without permission in writing from ICS Electronics Ltd. No liability
can be accepted for any inaccuracies or omissions in the publication, although
every care has been taken to make it as complete and accurate as possible.
Copyright 2002, ICS Electronics Limited. All rights reserved.

NAV6plus NAVTEX System User Guide
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Important Information
This equipment is not approved for use by SOLAS convention
vessels within the Global Maritime Distress and Safety System
(GMDSS)
It is intended for use by leisure craft and other non-SOLAS vessels
wishing to participate within GMDSS
Safety Warnings
Do not use the sensor as a grab-handle
This instrument is for use as an aid to sailors and should not lead
to a reduction in the level of good seamanship required at all times
Reception of messages cannot always be guaranteed as this
depends on local radio propagation
The correct magnetic variation must be input at the navigation
instruments (e.g. GPS, electronic compass) for the accurate
display of COG, set, waypoint bearing and heading.

NAV6plus NAVTEX System User Guide
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Contents
Quick Start..................................................................................................... 5
Introduction.................................................................................................... 5
NAV6plus Features ....................................................................................... 6
Advanced Operation ................................................................................... 20
NAVTEX Mode............................................................................................ 20
Navigate Mode ............................................................................................ 26
Setup Mode ................................................................................................. 31
Alarm Operation .......................................................................................... 48
Printing NAVTEX and Navigation Log ........................................................ 49
Output to a PC or Plotter............................................................................. 50
Installation ................................................................................................... 51
Installation of NAVTEX Sensor ................................................................... 53
Mounting the Display Unit ........................................................................... 56
Connecting Up............................................................................................. 58
Testing the NAV6 After Installation ............................................................. 65
Maintenance and Trouble Shooting ............................................................ 66
Warranty...................................................................................................... 68
Glossary ...................................................................................................... 69
Packing List and Options ............................................................................ 69
Specification ................................................................................................ 70
Outline Drawings......................................................................................... 72
Appendix I: NAVTEX Station Database ...................................................... 73
Appendix II: Message Type Indicators........................................................ 77
Appendix III: NMEA Sentences Supported ................................................. 77
Appendix IV. Optimising NAVTEX Reception. ............................................ 78
Appendix V. Frequently Asked Questions .................................................. 82
Appendix VI. Sensor cabling ....................................................................... 85
Appendix VII: NAV6 Menu Navigation ........................................................ 88

NAV6plus NAVTEX System User Guide
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Congratulations on purchasing this ICS Electronics Ltd product. It is
not only an excellent NAVTEX receiver, but a first class instrument
repeater. It may be the only display you will ever need at your navigation
position. We hope that it gives you many years of reliable service.
Please take the time to read this manual carefully as it contains some
essential information regarding the operation and maintenance of the
product and a useful background to the NAVTEX system.
We recommend that you regularly visit the ICS website
www.icselectronics.co.uk for information on updates, the availability of
software enhancements, further options and support. The support pages
contain frequently asked questions about the Nav6 that you may find
useful. There is also a NAVTEX database providing a list of operational
NAVTEX stations and their details.
The IMO and various national coastguards also operate informative
websites that you may wish to visit; see www.icselectronics.co.uk/links.

NAV6plus NAVTEX System User Guide
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QUICK START
QUICK STARTQUICK START
QUICK START
You will find this product extremely easy to operate. Please don't be
intimidated by the comprehensive nature of this manual. In reality,
receiving your first NAVTEX messages could not be simpler.
•Follow the installation guidelines
•Re-check the cable connections
•The NAV6plus has no ON/OFF switch, it will start up as soon as
power is applied
•If you have not connected a GPS navigation receiver, make sure
that you set the date and time on the screen which will appear at
start up
•Wait for your first NAVTEX message. If you are within range of a
NAVTEX transmitter, you should not need to wait for more than four
hours.
•Refer to “Appendix IV : NAV6 Menu Navigation” for an overview of
the available operating modes & how to switch between them.
•Read the “Basic Operation” section to find out how to use some of
the commonly used features of this product
•If you then want to get the best from the system, read the rest of the
manual!
INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
What Is NAVTEX?
What Is NAVTEX?What Is NAVTEX?
What Is NAVTEX?
NAVTEX is a worldwide system for the broadcast and automatic
reception of maritime safety information (MSI) in English by means of a
narrow-band direct-printing telegraphy. NAVTEX provides shipping with
navigational and meteorological warnings and urgent information.
NAVTEX is an element of the IMO/IHO worldwide Navigational Warning
Service (WWNWS) as defined by IMO Assembly Resolution A.706(17).
It is included within the Global Maritime Distress and Safety System
(GMDSS). Since 1 August 1993, a NAVTEX receiving capability has
become mandatory equipment for certain vessels under the provisions
of the International Convention for the Safety of Life at Sea (SOLAS).
NAVTEX broadcast information is available to all seafarers, free of
charge.

NAV6plus NAVTEX System User Guide
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How Does NAVTEX Work?
How Does NAVTEX Work?How Does NAVTEX Work?
How Does NAVTEX Work?
NAVTEX transmissions are sent from stations situated worldwide. The
power of each transmission is regulated to avoid the possibility of
interference between transmitters. Each station is allocated a 10-minute
time slot every 4 hours so that many stations can share the same
frequency. Stations typically have a transmission range of 250 – 300
Nm.
NAV6PLUS FEATURES
NAV6PLUS FEATURESNAV6PLUS FEATURES
NAV6PLUS FEATURES
Display Unit
Display UnitDisplay Unit
Display Unit
•The Display Unit uses a high resolution backlit LCD to display
NAVTEX messages in a choice of text sizes.
•The display unit contains a large non-volatile memory to store
NAVTEX messages, NAVTEX station database, all of the user
settings, filter options, LCD contrast and backlight levels. All
messages and settings are retained during power down.
•Several messages can be displayed at once (depending upon the
length of the message) and messages can be scrolled with a single
keypress.
•Messages can be filtered and sorted using a number of user
selectable criteria.
•The NAV6plus can act as an NMEA instrument repeater and is
capable of displaying data in a choice of formats.
•The NAV6plus can be connected to a printer or computer to print
NAVTEX messages and Navigation logs.
•Audible and visible alarms can be set up to indicate reception of
SAR and/or New Messages.
•A sleep mode allows long standby periods with minimum power
consumption, such as when the vessel is left in a marina with main
batteries being trickle charged from the shore.
Sensor Unit
Sensor UnitSensor Unit
Sensor Unit
•The Sensor Unit contains a dual receiver that can receive on both
490kHz and 518kHz simultaneously.
•Multiple sensors and displays can be connected together.

NAV6plus NAVTEX System User Guide
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BASIC OPERATION
BASIC OPERATIONBASIC OPERATION
BASIC OPERATION
The NAV6plus is a flexible & powerful tool for receiving, storing &
viewing NAVTEX messages. To assist you in getting the best from your
NAV6plus, read this section which contains short cuts to the most
commonly used NAVTEX operations. Read the rest of the manual for a
comprehensive guide to the NAV6plus.
First, find your way around the keypad and the display.
•Centre keys are a ‘navigation pad’ ( UP DOWN LEFT RIGHT ).
•Softkeys are situated on either side of the navigation pad. The
current function is shown on the soft-key menu area at the bottom of
the LCD.
•The
MODE softkey switches between the three operating ‘modes’
(NAVTEX, Navigate & Setup).
•The
VIEW softkey switches between ‘views’ in each operating
‘mode’. If a ‘view’ has several ‘pages’ associated with it then these
are selected with the page softkey.
•Operate the keys in this order to get to the mode that you want:
MODE →VIEW →PAGE →FUNCTION
softkeys
navigation pad
The Keypad
FUNCTION PAGE VIEW MODE

NAV6plus NAVTEX System User Guide
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Tip: Pressing a Softkey cycles through a series of options. The Softkey
labels change indicating what the current function of the Softkeys are,
pushing a different Softkey key will lead you to different options.
If you don't want the options on offer, keep pushing the same Softkey to
return back to where you first started.
The Display
At the bottom of the display is the softkey menu area:
The softkey menu area shows what each softkey does in the current
operating mode.
•The top line of each softkey menu box indicates the option that is
currently selected.
•The bottom line of each softkey menu box indicates the current
function of that softkey.
The example above shows the NAV6plus in NAVTEX Mode.
Current softkey function
Current option

NAV6plus NAVTEX System User Guide
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At the top of the display is a status bar:
The status information is displayed as a series of icons. The meaning of
the icons is as follows:
Message identifier for the upper most message
An alarm is active
NMEA / GPS position data available
490 kHz reception available
518 kHz reception available
Receiving message now
Signal Carrier, but no message
Sensor communication fault
SAR message received
NEW message received
UTC Time

NAV6plus NAVTEX System User Guide
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Viewing & Scrolling Through NAVTEX Messages
To view NAVTEX messages you must first select the NAVTEX Mode.
Use the right hand softkey to change modes until ‘NAVTEX Mode’ is
visible in the right hand softkey menu box.
You can now use the UP, DOWN, LEFT & RIGHT keys to scroll
through any previously received messages that already show on the
display.
•UP & DOWN keys scroll line by line
•LEFT & RIGHT keys scroll message by message
The messages currently displayed are a sub-set of all the
messages stored in memory. Whether you can see a particular
message or not depends upon the current station selection,
message filter and age limit settings and the sort order applied (see
following sections for details).
There is a dark coloured scroll bar down the right hand side of the
display to assist in navigating through the messages.
Message Storage
All received NAVTEX messages are stored in the NAV6plus regardless
of whether you have them selected for viewing or not. The memory size
provides enough storage for all messages received in any 72 hour
period (in fact much longer). You can even change your mind later and
view a message that was received previously but not displayed at the
time by simply changing a 'filter preset' , message 'filter setting' or 'age
limit'.
•Messages to be displayed are selected from the NAV6plus memory
by applying a 'filter preset' and message age limit setting.
After using the NAV6plus for a while you may notice that if you
receive a particular message more than once there will only ever be
one copy in view. The NAV6plus stores only the best version of a
message. It even attempts to repair corrupted messages by
comparing copies of the same message!

NAV6plus NAVTEX System User Guide
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NAV6plus NAVTEX System User Guide
12
Filter Presets
The messages currently available for viewing are selected from all the
messages stored in memory by applying 'Filter View' presets’.
There are 5 separate filter view presets, each preset has its own set of 4
'filter page settings'.
•Filter page settings are used to define which messages are in view
and which messages are hidden from view.
To view the 'active' filter preset number go to [NAVTEX Mode⇒
⇒⇒
⇒Filter
View]. You will notice that the left hand softkey is labelled PRESET and
a number from 1 to 5 is visible. This number is the current 'active' filter
preset number.
•Each of the 5 presets has its own 4 filter pages associated with it
(518 Types, 518 Stns, 490 Types & 490 Stns)
1 of 5
Preset
490 Types
Page
2 of 5
Preset
Left
Hand
490 Stns
Page
Centre
Left
3 of 5
Preset
Key
Press
518 Types
Page
Key
Press
4 of 5
Preset
518 Stns
Page
5 of 5
Preset
•Pressing the PRESET softkey will change the active preset number.
You will notice that the filter page settings change as each different
'preset number' is selected.
Note that the 'active preset' is always the preset that is applied to
the NAVTEX message display.
1 of 5
Preset
518 Types
Page
Filter
View
Navtex
Mode

NAV6plus NAVTEX System User Guide
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•Presets can be used to switch quickly between different sets of
messages filter selections.
For instance, if you want to show just ‘weather warnings from all stations
in range’, you can set up a preset number to do just that.
•Although the presets are pre-programmed, you can customise them
to meet your exact requirements.
Tip : Start by using 'preset 1' for normal operation, only use the other
presets once you are familiar with the way presets work and want to
switch quickly between different sets of message selections.
Station Selection
If you leave all NAVTEX stations selected for viewing (subject to your
current location) you may quickly become overwhelmed with NAVTEX
messages.
By filtering out unwanted stations, you can greatly reduce the amount of
unnecessary messages that are displayed. Station filtering can be
automatic or by manual selection.
•Automatic selection can be used if a GPS is connected to the
system. The 'in range' stations are then calculated based on the
information stored in the station database.
•Manual Station selection is used whenever a GPS position fix is
unavailable, or can be used to override an automatic selection.
View the current stations settings.
Go to [NAVTEX Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Stns Page].
Pick the required 'preset number' (use preset 1 if you are just starting for
the first time)
•You will notice that each 'station setting can be changed between
On, Off or Auto.

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Setting Operation
On Messages from station always in view (see note 1)
Off Messages from station never in view
Auto Messages from station only viewed when nearest or in
range depending upon setting (see note 1)
note 1 : messages are only displayed if they also fall within the ageing
limit, error limit and message category filter settings.
An * (asterisk) to the right of the station name indicates that the station is
currently selected.
Automatic Station Selection Using GPS
Many users will just want to display messages from the nearest
NAVTEX station, or only from stations that provide information in their
cruising area. This is easily achieved by connecting a GPS receiver and
letting the NAV6plus automatically make the best selection.
Go to the [NAVTEX Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Stns Page].
Select the required 'active preset number' (use preset 1 if you are just
starting for the first time).
•Use the
LEFT or RIGHT key to move between the 'In Range' or
'Nearest' setting.
•Provided all the station names have 'Auto' next to them and the
GPS position fix is valid, an asterisk will appear to the right of the
currently selected station names.
•Ensure that all the stations that you want to view have a asterisk by
them.
You can still override an automatic selection by 'forcing' an individual
station 'ON or OFF'
To do this, move the cursor over the station name, use the LEFT &
RIGHT cursor keys to change between ON, OFF (or back to AUTO).
Tip : You may wish to set your ‘home’ station to always 'ON' so that you
can display its messages even if it is not currently an automatically
selected station.

NAV6plus NAVTEX System User Guide
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Note that if a valid GPS position fix becomes unavailable, after a
short time delay all 'auto' stations will turn on and remain on until
the GPS position returns.

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Manual Station Selection
If no GPS position fix is available or no GPS is connected to the system,
you will probably need to manually select or de-select unwanted stations
from view.
Go to the [NAVTEX Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Stns Page].
Select the required 'active preset number' (use preset 1 if you are just
starting for the first time).
•Use the
UP & DOWN keys to move the cursor over the station
name.
•Use the
LEFT & RIGHT cursor keys to change between ON, OFF
(not AUTO)
Message Filtering
You can further reduce the amount of messages that are displayed by
applying filters to the message categories.
Go to the [NAVTEX Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Types Page].
•Select the required 'active preset number' (use preset 1 if you are
just starting for the first time).
Each message category type can be turned ON or OFF, or made to
display NEW messages only by using the UP, DOWN, LEFT & RIGHT
keys.
‘New’ Messages
Sometimes it is useful to know which messages have been received
since you last looked at the NAV6plus display. Whenever a message is
received the message header box displays a ‘NEW’ or 'SAR' icon.
Even if a new message is currently out of view, the status bar at the top
of the display will also indicate a ‘NEW’ icon.
Go to [NAVTEX Mode⇒
⇒⇒
⇒Message View]
•What was the PAGE soft key has changed to a NEXT NEW key.

NAV6plus NAVTEX System User Guide
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•The left hand softkey is now a MARK READ key.
Once you have read the ‘NEW’ message and want to clear the ‘NEW’
icon, press MARK READ.
The ‘NEW’ icon will disappear from the message header.
•Press
NEXT NEW to move on to the next NEW message.
•Once all NEW messages have been marked as read the ‘NEW’ icon
in the status bar at the top of the display will disappear.
Hiding 'marked as read' messages from view
Messages that have been ‘marked as read’ are still displayed but now
without a ‘NEW’ icon.
If you wish, you can automatically hide 'marked as read' messages from
view.
Go to [NAVTEX Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Types Page]
•Select the required 'preset number'
•Place the cursor bar over the message categories that you want to
hide and change to ‘New’ instead of ‘On’.
You may wish to leave SAR messages as ‘On’ so that they are not
hidden once read.

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Displaying the Newest Message
To display the newest message at the top of the display.
Go to [NAVTEX Mode⇒
⇒⇒
⇒SortView⇒
⇒⇒
⇒Descending Order⇒
⇒⇒
⇒Date Criteria].
•The newest message is now at the top of the display.
Caution : Messages are 'date and time' stamped even if there is no
GPS connected and therefore no corrected time reference to work
from.
When you first power up the NAV6plus, if there is no GPS
connected you should manually enter the date and time. From
then on the NAV6plus will keep time until power is removed from
the system.
The NAV6plus 'Calendar & Clock' stops while power is off,
consequently the date and time should be checked and if
necessary corrected each time the system is powered on.
You could choose to just ignore setting the correct date and time,
messages will still be date stamped in a chronological order but
remember that the indicated time of reception will then be wrong.

NAV6plus NAVTEX System User Guide
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Message Ageing
NAVTEX messages become less relevant over time & eventually may
just clutter the display.
In order to reduce the number of obsolete NAVTEX messages that are
being displayed, the NAV6plus uses the concept of a message ‘Age
Limit’.
•By setting an age limit it is possible to hide older messages from
view.
Go to [Setup Mode⇒
⇒⇒
⇒NAVTEX View⇒
⇒⇒
⇒Options Page]
•Use the
UP or DOWN key to move the cursor over the age limit
setting, the LEFT & RIGHT keys to select a new value.
3 days is an appropriate age limit to select as most NAVTEX messages
have a nominal life of 72 hours.
Set a longer age limit if you want to display NAVTEX messages going
back over previous days and weeks.
Remember all messages are still stored in memory for a
considerable length of time, consequently increasing the age limit
can bring older messages back into view.

NAV6plus NAVTEX System User Guide
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ADVANCED OPERATION
ADVANCED OPERATIONADVANCED OPERATION
ADVANCED OPERATION
This section provides a detailed description of the ‘advanced’ operation
of your NAV6plus. The three operating modes are described in detail.
Remember to use the right-hand MODE softkey to switch between the
operating modes.
NAVTEX MODE
NAVTEX MODENAVTEX MODE
NAVTEX MODE
NAVTEX Mode is only available if a sensor
is (or has been) connected to the display
and the NAVTEX frequency setting on the
NAVTEX options page is set to 518 kHz,
490 kHz or Both.
In NAVTEX Mode, the display consists of a
large area dedicated to displaying NAVTEX
messages, with a status bar at the top, and
descriptions of the softkey functions at the
bottom.
It is possible to scroll up and down the
messages line by line, using the UP and
DOWN keys. Additionally, you can step
through the display, message by message
using the LEFT and RIGHT keys.
Four different ‘views’ can be selected by pressing the VIEW softkey:
Message View
Print View (when enabled in setup)
Sort View
Filter View